A simple fix would be to not bother publishing a top contributors list.
I'm not sure this is a good idea. If there's something that empirically makes us look like we're not being rational we should deal with that issue. Hiding that data is not a good solution.
However, I do have to wonder what in general the point of having the top contributors is. I'm not even sure that total karma is a useful metric of much since one person could have much higher quality comments than another but most much more rarely and yet the person with high quality comments presumably should receive more attention and their comments should be more close...
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